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,1 W 1 v i i i ilNITED STATES PATENT OF 4 a .TfN-t 1;. 3 JAMES w. TALLMADQQI on NEW YORK, N i i 4:43? k p s j FLUID INK-ERASER. mmewt d g 6 7 I SPECIFICATION forming part of Letters Patent No. 358,901, dated March 8, 1887.

Application filed June 9, 1886. Serial No. 204,662. (No specimens.)

To all whom it may concern.-

Be it known that I, J AMES W. TALLMADGE, of New York, in the county of New York and State of New York, have invented anew and useful Improvement in Chemical Fluid Ink- Erasers, which I have called Perennial Ink- Eraser, of which the following is a specification.

My invention is intended for the use of merchants, lawyers, book-keepers, clerks, and the writing community in general, to be used instead of a lance or scraper for erasing ink from paper or parchment, in order to instautlyrectify a mistake or clean off a blot without any I5 injury whatever to the printers ink upon any printed form-such as a deed, n1ortgage,,or bill-head; or the ruling upon any mill-ruled papersuch as legal cap, foolscap, &c.saving the time and labor of scratching, and leaving the paper or parchment as clean and good to write upon as it was before the mistake or blot was made.

My invention consists of the following recipe, compounded in the proportions arbitrarily as set forth, or with so slight deviation as to make no substantial or easily-perceptible difference.

Recipe.--To one ounce of solution of chloride of lime add two drops of acetic acid.

I also suggest the following to be the best- 1 thoroughly shaken when first put together and allowed to soak twelve hours, then 'filtered through filtering-paper.

Acetic acid is a sour acid, and used in making vinegar, 8:0.

With the aid of my invention a mistake or blot can be rectified in aninstant,withoutlaying the pen down, by simply reversing the pen-holder in the hand and dipping it into the bottle of eraser and applying it to the word, figure, or blotyou wish to erase, and the ink will instantly disappear. Then immedi- 5 5 ately absorb the fluid with a blotter, and the paper is as good as new to write upon again at once. The old way of scratching out inkblots and mistakes not only consumes valuable time and spoils the surface of the paper, but the ink will spread and blot when written over again; and in case of ablot on any printed form, you cannot scratch it olf without spoiling the form if it is done with a knife or scraper.

This eraser is perfectly harmless to the hands or clothing, and does not contain poison. It also removes stains, made by ink, fruit, &c., from cotton, linen, and the finest laces without the least injury to any goods that water will not injure; therefore it is invaluable to all, from a school to a bank, as a companion to the writing-desk for erasing ink from paper and parchment, and to every housewife for cleaning stains from laces, linens, &c.

I am aware that chloride of lime has before been used with acids for the purpose above proposed; but in all previous processes, except as patented to myself January 16, 1872, so far as I am aware, chloride of lime has been mixed with acids that burn and destroy the paper, and for this reason ithas proved worthless, and the recipe in the above-named patent to me, dated January 16, l87 2, No. 122,867, has proved of little value, because acetic acid is used to excess (a tea-spoonful, instead of two drops.) That quantity of acetic acid sets the chloride free, and forms a strong, offensive, and expansive gas, which will blow the stoppers from the bottles in forty-eight hours after mixing. and therefore it loses its strength and erasing quality by evaporation; but my invention compounded in the proportions given in my recipe above stated will not form any ofi'ensive gas, will not blow the corks out of the bottles, and will not evaporate or lose its strength or erasing qualities.

I therefore claim- The herein-described compound to be used 7 as and for the purposes stated, consisting of ace id and solution of ghIgyjfle fi lime in t c proportions speci ed, to wit: to one ounce of solution of chloride of lime add two drops of acetic acid.

In testimony whereof I have signed my name to this specification in the presence of two sub- 10 5 

